Results 151 to 160 of about 3,278,550 (239)

86th Annual Meeting of the Meteoritical Society (2024)

Meteoritics &Planetary Science, Volume 59, Issue S1, Page A1-A468, August 2024.
wiley   +1 more source

Mid-infrared JWST Spectra of Carbon Stars in the Large Magellanic Cloud

The Astrophysical Journal
Mid-infrared spectra from the Medium Resolution Spectrometer (MRS) on the James Webb Space Telescope have revealed the molecular chemistry of carbon stars in the Large Magellanic Cloud with better resolution and sensitivity than previously possible.
G. C. Sloan, B. Aringer, Kathleen E. Kraemer, J. Cami, K. Eriksson, S. Höfner, K. Justtanont, E. Lagadec, Paola Marigo, M. Matsuura, I. McDonald, E. J. Montiel, R. Sahai, A. A. Zijlstra   +13 more
doaj   +1 more source

Infrared Spectral Energy Distribution Modeling of Velocity Excess in Maser Sources: Identifying Incipient Water Fountain Candidates

The Astrophysical Journal
We investigated whether “velocity excess” in circumstellar maser lines can diagnose the earliest evolutionary phases of water fountains (WFs). Here, we define “velocity excess” as maser emission (e.g., H _2 O 22.235 GHz or OH 1665/1667 MHz) detected at ...
Jia-Yong Xie, Jun-ichi Nakashima, Yong Zhang   +2 more
doaj   +1 more source

Thermal Structure and Millimeter Emission from a Protoplanetary Disk with Embedded Protoplanets from Radiative Transfer Modeling

The Astrophysical Journal
The discovery of protoplanets and circumplanetary disks provides a unique opportunity to characterize planet formation through observations. Massive protoplanets shape the physical and chemical structure of their host circumstellar disk by accretion ...
Felipe Alarcón, Edwin A. Bergin
doaj   +1 more source

A Theoretical Study of Carbon Nanotube Formation: Carriers of the Diffuse Interstellar Bands?

The Astrophysical Journal
Density functional theory (DFT) calculations have been conducted to probe the formation of carbon nanotubes (CNTs) from graphitic sheets in the presence of a simulated circumstellar shock wave.
A. Thakur, P. J. Lohr, J. J. Bernal, A. Asaduzzaman, K. Muralidharan, T. J. Zega, L. M. Ziurys   +6 more
doaj   +1 more source

Physical conditions in the circumstellar gas surrounding supernova 1987A

, 2012
published_or_final_version ; toc ; abstract ; Physics ; Master ; Master of ...
openaire   +2 more sources

Observations and Radiative Transfer Simulations of the Carbon-rich AGB Star V Oph with VLTI/MATISSE

The Astrophysical Journal
Carbon-rich asymptotic giant branch (AGB) stars are among the most important contributors of enriched materials to the interstellar medium due to their strong stellar winds.
Jon Hulberg, Gioia Rau, Markus Wittkowski   +2 more
doaj   +1 more source

Final Moments. II. Observational Properties and Physical Modeling of Circumstellar-material-interacting Type II Supernovae

The Astrophysical Journal
We present ultraviolet/optical/near-infrared observations and modeling of Type II supernovae (SNe II) whose early time ( δ t < 2 days) spectra show transient, narrow emission lines from shock ionization of confined ( r < 10 ^15 cm) circumstellar material
W. V. Jacobson-Galán, L. Dessart, K. W. Davis, C. D. Kilpatrick, R. Margutti, R. J. Foley, R. Chornock, G. Terreran, D. Hiramatsu, M. Newsome, E. Padilla Gonzalez, C. Pellegrino, D. A. Howell, A. V. Filippenko, J. P. Anderson, C. R. Angus, K. Auchettl, K. A. Bostroem, T. G. Brink, R. Cartier, D. A. Coulter, T. de Boer, M. R. Drout, N. Earl, K. Ertini, J. R. Farah, D. Farias, C. Gall, H. Gao, M. A. Gerlach, F. Guo, A. Haynie, G. Hosseinzadeh, A. L. Ibik, S. W. Jha, D. O. Jones, D. Langeroodi, N LeBaron, E. A. Magnier, A. L. Piro, S. I. Raimundo, A. Rest, S. Rest, R. Michael Rich, C. Rojas-Bravo, H. Sears, K. Taggart, V. A. Villar, R. J. Wainscoat, X-F. Wang, A. R. Wasserman, S. Yan, Y. Yang, J. Zhang, W. Zheng   +54 more
doaj   +1 more source

Dust dynamics in planet-forming discs in binary systems. [PDF]

Eur Phys J Plus, 2023
Zagaria F, Rosotti GP, Alexander RD, Clarke CJ.   +3 more
europepmc   +1 more source

Outward Migration of a Gas Accreting Planet: A Semianalytical Formula

The Astrophysical Journal
Type II orbital migration is a key process to regulate the mass and semimajor axis distribution of exoplanetary giant planets. The conventional formula of Type II migration generally predicts too rapid inward migration to reconcile with the observed ...
Shigeru Ida, Ya-Ping Li, Jun-Peng Pan, Yi-Xian Chen, Douglas N. C. Lin   +4 more
doaj   +1 more source